Here I have extracted a part of an image
1.Open the PDF file(in Adobe reader) from which you want to extract the image.
2.Select the snapshot tool as shown below.
3.Select the part of image by drawing with snapshot tool,here I have selected the portion “TOOL VICE”.
4. After selecting you can see a dialog box as shown below.
5.Now open the paint, and press SHIFT+INSERT from the keyboard to paste the copied area.
6.Now go to File>Save & save the picture.